Apparatus for applying coating



March 16 ,'1926. 1,576,725

H. W. DAY

APPARATUS Pm MPMHNG COMING Patented Mar. 16, 1926.v Y

UNITED STATES PATENT OFFICE.-

APPARATUS FOB APPLYING COATING. Application filed March-1, 1922. Serial No. 54G,17I.

f'o-ul whom l :my conc-ern.: if desired and also with a. passage 7 forthe Be it known that I. Hruurirr W. Der, a air or other suitable fluid under pressure. citizen of the I'nitcd States, and a resident In tlie form of tool herein shown, I have of Wollaston. in 'the county of Norfolkand represented the passages 6, 7 as pipes suit-i State of Massachusetts, 4have invented an ably secured in the body 1 and as' como Improvement in Apparatus for Applying munca'tin'nr at their inner ends with passages Coating, of which thefollowing descriptiom' 8, 9 cored or otherwise suitably provided in connection with the accompanying drawin the body l. Controlling the paint supply rings. .is a specification, like characters on the passage 8 is a valve which may be of any 10 drawings representing like parts. suitable form, but which is herein repre- 65 This invention relates to apparatus for sentefl as an axially movable piston or applying coating to surfaces. plunger 10 positioned within a valve cashe coating, if a liquid, may be a paint ing 11 and having a stem 12 extending japan, varnish of any other suitable coat through the valve casing into Contact with 16 ing medium. or it may. if idesired, be a solid the operating lever A, as clearly shown in 10 in powdered form. and the material or sur- Fig. I. The valve here shown as a piston face to which it is to be applied may be or plunger is normally held seated 'by a of anveharacter. such.' fonexample, as wood: coiled spring 13 surroundingr the. stem 12 metal or other material. and seated in a recess 14 in a cap 15 threaded 20- Re erring more particularly to thedrawat 16 into the body l similarly threaded 75 ings, wherein I have refresented a single at 17, embodiment of my in\feniot1,v The passage 9 for the air is controlled by Fig. 1 is a vertical longitudinal section a similar valve indicated generally at 18 in of a tool constructed inaccordanco with my Fig. `2. the spindle" 19 thereof contacting l invention; with the valve operating lever 4 which is 80 Fig. 2 is an end elevation ofthe tool lockshaped so as' to engage both valvesI in a 1 ingtoward the right in* iig. 1, manner herein unnecessary more fully to l ig. 3 is a vertical s tion Aupon the line illustrate. 3-3 of Fig. 1; t' The body 1 `is cored to provide clonin- 30 F ig. 4 is a similar sectioli but representing tudinal' passage 20 which is internally 8B the supplementally air discharging member threaded at 21. 22 for the reception respecas turned to a position ninety degrees retively of a tubular member 23 threaded at moved from that indicated in Fig. 3; and V24 and a needle valve 25 threaded at 26. ig. 5 is a vertical central section of the The tubular member 23 at its forward end, discharge end of the to representing nis preferably suitably form-ed to 'Kermit ther 90 somewhat i modified for ,o my invention. passage ofthe coatingr material iss ling from The tool or appliance liiavbe of anv suitthe valve .chamber 10 into the [Missatgev 27 4able material lint is preferably metallic and and thence into the eireumferentialV space maay be of the. aeneralvt'orm shown in my V28. For this purpose. the forward end'of 0 Patent4 No. 1.172.233. dated February` 15. the tubular member 20 is preferably squared. 95 1916, or of any other suitable form orcon- Thus the coating material. when the valve struction. The body 1 is, however, preferi 10 is opened. is permitted to flo throughY ably provided with a handle or extension the passage 6. the valve casing 11, thel pas- 2 integral therewith and provided with a Sages 27. v28. and thence past the squared guard 3 inclosingthe free end of che valve formation. Upon the forward end of the 100 operating lever 4 pivoted at 5 upon the body tubular member 20 is threaded or otherwise 1. In thiI disclosed form of the invention. positioned a cap B0, which mav if desired the said operating lever 4 is of general he similar to the correspondinfi4 membir in trigger form. hut such construction may be my Patent No. 1.172.233. The needle valve Widelyvaried within the scope and purpose 25 is seated at its outer end in the cap 30 105 of the invention. ais indicated in Figxl, and the forward end if@ The handle. 2 is provided with a passage of the said needle valve is guided and posithe paint or other suitable coating tioned by any suitable means, as, for ex- Vuid or powder. which may be supplied ample, by a coiled wire 31 encirclingl the i A :ugh gravity or under suitable pressure' head of-tl.J valve and it in a 1w `face 38 and a small central position when the valve is unseated. The rear'end of the valve 25 may be pro vided with a suitable lock nut 32.

The air passage 9 is in communication with a passage 33 indicated in dotted lines in Fig. 1, which is itself in communication with the valve chamber containing the valve 18 and extending from such valve chamber is an air passage 34 indicated in dotted lines in Fig. 1 and communicating with a passage forming an enlargement of the passage 36 of the tubular member 20. \Vhen'the valve 18 is opened, the air Hows through the passage 33 past the valve 18 through the passages 34, 35 and into the passage 36 governed or controlled by the needle valve 25.

Upon the outer end of the body 1 is threaded or otherwise suitably secured a preferably cap-like member 37 herein shown as having a concaved or curved inner surcentral opening 39 in line with the axis of the needle valve 25. The length of the threaded portion 40 of the cap-like member 37 is sufficient to permit adjustment of the member 37 so as to provide for the effective formation of a film and the variation of the thickness thereof as described in my Patent No. 1,172,233. Such film is constantly formed and maintained by capillary action between the surface 38 and the outer surface 41 of the inner cap 30 which are brought close enough together to insure such action. The air entering through the passage 36 breaks through the film at the central portion of the cap and discharges the same upon the work in very fine globules. Said film is constantly broken by the air or other fluid but is con stantly restored through the action of capillarity. Hence the. coating material may be merely under suction due to capillarv action. The. maintenance of the supply of coating material is not dependent upon the presence of the air current which is used merely to break the film and discharge the globules. I effect through the described construction a very fine division of the coating material as set forth in my said Patent No. 1,172,233.

The construction of parts thus far dcscribed effects the formation of a mass of spray of lgeneral conical form issuing through the orifice 39. but generally circular in cross section. This result is effected by the disruption of the film formed between the cap like members 30, 37 through the agency of the air or other suitable fluid in the manner already '.lcscribed.

I am aware that it has been proposed to modify the character of the spray issuing from a tool or appliance for applying coat ing by means of sup lemental jets of air directed upon the discharged spray. as shown. for example. in the patent to llurdick. No. (340,430, dated May l5. i900. In

accordance with this patent, the shape of the spray discharge is changed from a eircular form into that of a thin sheet through the use of supplemental air jets directed upon the spray issuing from the discharge end of the tool or like; appliance.

As fully set forth in my Patent 1,321,014, I therein provide for discharging supplemental air jets upon the discharged film of rpaint or other coating material and in such a manner as to change or transform the issuing spray from a conical formation circular in cross section into a sheet. In said patent I disclose means and a process whereby a mass of spray as discharged may be given any form in cross section between that of a relatively thin sheet and a conc or mass circular in cross section.

In accordance with the I provide means whereby the issuing.,1 s ray maybe permitted to retain itsl shape de ned as circular in cross section or whereby said issuing spray may be given the form `c iifa relatively thin sheet located or existinpj'in any one of a plurality of lines or planes. In the disclosed embodiment of the invention means are provided to give the issuing spray the form of a relatively thin sheet in either of two lilies or planes 180 degrees apart, but withinthe scope and purpose of the invention, other and intermediately positioned lines or planes of discharge may be provided for. Without limiting myself to the disclosed embodiment, I will set forth ,one means for accomplishing the desired result.

I provide a generally cylindrical member 42 having any suitable number of (and preferably two) tubular extensions 423, 44, preferably diametrically opposed to each other and terminating in discharge passages 45, 46 desirably inclined toward each other and clearly represented in Fig. 1.

The two or other number of supplemental air passages 43, 44 are in communication at certain times at 4their inner ends through ports or passages 47,48, with a completely annular passage or groove 49 formed upon the outer surface ofthe forward end of the body 1 as indicated in Fig. l, said annular passage or groove communicating with the ports or passages 47, 48 through tour ports or passages 50, 51, 52, 58, most clearly indicated in Fig. 3, it being understood that more than four ports or passages may be provided, thus giving still further positions of the coating sheet. 4

Each of the ports or passages 4T. 48 is preferably of small diameter. and the several passages 50, 51., 52, 53, are also of small diameter, so that by a relatively slight turn ing movement of the cylindrical member 42, the passages 47, 48 are removed from communication with the ports or passages.0, 51 or $2. 53. as the case may be.

In that form of my invention shown in Fig. l the cylindrical member 42 is proprcsent invention size, but desirably the passages are of suchv size that a comparatively small movement of the cylindrical member 42 in a circumferential direction interrupts the communica-l tion. The threads 54, 55 are of such char acter that a suiiicient turning7 movement to cause engagement or disengagement of the said ports and passages will not cause leakage of the air or other motive agent between the threads.

The annular passage or grooveY 49 and hence the'passages 48, 44 are in communica- "ytion with the longitudinally extending passage 56 and the communicating passage 5T of the body l, such passage 5T being in communication with the main air passage 35 through a small port 58. Said port 58 is not controlled by a valve as in my said Patents 1,321,014 and 1,368,612. since in order to interrupt the communication Vbetween the main air passage and the supplemental air passages 43, 44.1 depend wholly upon the described turning movement of the cylindrical member 42.

It will be evident that the annular passage or groove -119 may if desired be formed in the inner surface of the member i2 anfl that other changes may be made within the scope and purpose of :n v invention. lt will be understood from the foiegoing description that the supplemental air passages 43, 44 are not in constant conununication with the annular passage or groove 49, but are in communi` cation therewith only in certain circumferential positions. uhich in the disclosed embodb ment of the invention are located ninety de grees apart. so that the coating or paint sheet,

in the disclosed embodiment of the invention would exist either in the plane of the sheet o f the drawing or in a. plane normal thereto, it being understood that b v increasing the number of ports or passages. intermediate communicating positions may be provided for. lVith the present disclosure, however, the passages 43. 4t are out ot' communication with the annular passage 49 at all positionsexcepting the two that I have described.

In Fig, 5 I have shown a slightly modified form of my invention wherein the cylindrical meinbtr indicated at 42 is of shorter length but is dcsiralily screw threaded as ir1 dicaterl at upon its` inner surface. Upon the bod;4 l iu the .Muir of the Said cylindrical member 42 is a nut 60 serving to lock or hold (he cylindrical member 42 in 'any posata inw when a may be turned.

Otherwise the shown in Fig. 5 is desirably the -Satine-fas that shown in Fig 1. l y invention in its. broadest application is not limited to the formation Vof a film of the coating material, since such coating ma y 'ferial may be positioned' wit-h respect tothe dischar manner.

motive fluid in any suitable efe'rabl however, I provide Afor forming,- brea 'ng through and discharging the film.

Having thus described one illustrative embodiment of my invention I desire it to be understood thahalthough specific terms are employed they are used in a generic and descri tive sense and not for purposes of limitation, thesco e of the invention being set forth is the ifo lowing claims.

Claimsf f 1. Meaus fora' plying` coating comprising means to supp y coating material. means .to subject the same to the action of a motive agent, thereby effecting the discharge of thel coating material, and means to discharge a mot-ive agent supplementally upon the discharged coating material in any one of a plurality of predeterminedly spaced planes, the control of the discharge of the motive agent supplemcntally being effected Whollyby change in position of the means to discharge the motive agent supplementallyv said change in position cutting ofl' the supplemental discharge'when not in said predeterminedly spaced planes.

2. Means for applying coating compris` ing means to supply coating material. means to subject the same to the action of a motive agent. thereby effecting the discharge of the. coating material, and a member through which the motive agent may be discharged supplementally upon the discharged coating material` said member having a plurality of predeterminedly spaced positions in each of which the motive agent. is supple mentally discharged thereby., and one or more intermediate predetermined positions in which no supplemental discharge of the motive agent occurs.

3. Means for applying coating comprising means to .supply coating material. means to subjcctthe same to the action of a motive agent. thereby effecting the discharge of the coating material, and a member through which the motive agentV may be discharged supplementallv upon the discharged coating material. saidv member being mounted for turning movement upon the coating applying means. and having a plurality of prerleterminedly spaced positions in each of which the motive agent is supplementally discharged and one or moreintermediate predetermined positions in each of which the discharge of the motiveagent supplementaliy is prevented.

4. Means for applying coating comprising means to supply coating material, means to subject the same to the action of a motive agent7 thereby effecting the discharge ot the coating material, and a1 member through which the motive agent may be discharged supplementally upon the discharged coating material, said member haring 'opposed supplemental discharge passages adapted to occupy discharging positions in two planes or lines which are substantially normal to each other, and to occupyl intermediate positions in which the supplemental discharge is prevented by reason of such positioning ot said member.

5. Means for applying coating comprising a body haring means for maintaining a. film ot coating material and also haring means for causing a motive agent to break through and discharge said hlm, and a incinber adapte@ to discharge the motive agent. supplementally upon the discharged film to transform the latter into aV mass liming a different cross section, said member being mounted for rotation upon said bod \v and adapted supplementally to discharge the motive iagent only in a pluralityv of predeterminedl)1 .spaced planes, the control of the discharge ot the motive agent supplementall. in

' said planes being etlected wholly by change in rotational position of the said member upon said body.

(i. Means for applying coating comprising means for maintaining a film of coating material, means for causing a motire agent to break through and discharge said tilni` and inea-ns to discharge the lnoti'rr agent supplel'ncntally upon the discharged film to trans form the latter into a mass haring a different cross section, the, means' to discharge tlu` motive agent suppleinenlalli' upon the, disA charged film having a plurality ol predeterminedly spaced positions iu cai-h of which the motivo agent is supplenu-ntall); discharged thereby and intermediate prcdctcr mined positions in u'hirh no .supplemental discharge of the motire agent orf-urs.

T. trol l'or applying coatin"r comprising a body haring passages for coating material and for a innlire agent under prewiureilurt beingl in said body a plurality ol pairs olspared. suppcnacntul. lnoiiriA paf "a: f'i\ leading fron: said niolire agent pins-.ago and distributed in :i circular series tllrrlalmnt and incinlrer supported upon iid laldjr and haring a pair ol' (pposell supplr-mrilal linitive. agent discharge passages', said member having turningl on said body into and out of communication with selected supplemental motive passages.

8. tool for applying coating comprising a body having passages for coating inaterial and for a. motive .agent under pressure and a member supported for turning more nient upon said body and haring tno opposed supplemental motive agent discharge passages, said member .haring two motive agent passages leading to the said discharge passages and said body having a number of spaced, supplemental motive agent passages constituting a multiple of two` and respectireir in communication \rith the motive agent supply.

9. A tool tor applying coating con'iprising :i body having passages for coating material and for a motive agent under pressure and a member supported for turning movement upon said body and having two opposed supplemental motive agent discharge passages, said member having two motive agent. passages leading to the said discharge passages and said body haring four spaced supijilemenl'al motive agent passages posi` tioned ninety degrees apart and all in coininunicatioii 1with the motive agent supply.

lll. A tool for applying coating comprising a body having passages 'for coating n'iaterial and for a motive agent vunder pressure and la member sui'iported'for turn ing movement upon said bod \Y and'haring tiro opposed supplemental motivo agentdis charge passages. said member haring motive agent passages 4T, 4S leading to the said discharge passages and the body h aviiig spaced supi'ilcmontal motive agent passages 50. 5l. 52. 5? and an annular passage 4%) in communication therewith.

ll. tool for applying coating comprising a bod): haring passages for coating niaterial and For a n'iotirc agent under pressure. and a member l?. threaded upon the body; and "adapted to he tururd thereon into two positions ninety degree` apart in either of which the motive agi-nt may' be supple mentally '.lisrhargrd. said member 42 when in any intermediate position being thereby prcrentcd from discharging the niotire agent supplcmcntally.

lu twtinion) whey-cot'. l have signed my name to this .spia-iliration.

increment, without necessary substantial longitudinal movement. up-

4l. Means for applying coating comprising nie-uns to Supply coating iinitieriiil, menne to siihjcift the same to the nation of :i mntivc agi-nt.y thereby effecting the ilichnrgre of thu, coating' mzitixiiil. nini i1` mimhel through whiih ihn` motive :igi'nt muy he diwhiiig'vil siiiiiilvinclitnily npon tho ihnuhzirgl'od coating nintvi'iiil. Suid miimhii hzii'ing opposed Slippiiniintzil discharge pznng; n :iihipiilii to uigifnpy iiiisifhiirging posiions in two phinihl in' iinos n'hii-li :irc substantially noi-mili to mii-h ohii` '.inii in ociiiply intifininiiinti poi-iitionii in which thv niiplilelncntnl dini-lungi is lii'ieiuiitiiii by ieiisiin of siii-h positioningv of siiiil member.

Y). Miiins for applying i'oiitinp; compl'iS-i ing zi hody having lniiiins Tor ninintniningf n iihn of continglnzimiiii anni filsio hnvingll n10-uns foi' winning ii motivo ugent to 'nieiiii tlnoiigh :inii iiisi-hziigv sind inii :inii :i miini im? adapted to iiisihiiig'o the motivi: ngin Hiii'ilihlnini:iiiy upon lhi iiiflihni'ijiiii iihn io transform ihi hitter into :i uniss hiiiing' a different wasn foi'i'ion, siiiil miinhi'i' iiiiinfg nioiintiii Yin* i'oizitioi niion siiiii hoiili' :incl ziiliiptiii sinpiihliiiinitziily to iiiiii'hziigi thil motivo ugent imi)Y in ai phniihili' of pi'iiivim' minviiiy ipiiimi planos, the iriniti'iii ofthiA iii#r ii'iaige oi' thi motivo iig'ilni siippicniiiiii:lily in Suid iiizinis living eii'wivil wholly ivy ighiingi in i'iiitzitionni iyiitiim iii' thu mini iiii-nihi-iA upon Suid iinrly.

lli

Cerinicate of Correction.

It is hereby certified that tho March 16, 1926, upon ih(` :ilipliiaiion of Herbert i, liiy, of iihislolhy Massziihiisetts, for an improvement in Apparatus fin' Applving described and specified /lfL'saciusetti, as shown hy thi` ri Sald Letters Patent` shoiihi be rein I Painting Sa Finisiiing qElqiiipi/nint Salus (fm u Cinnmiition of Massachusetts," whereas said i l fied as Spray Pamtzng (zml Fz'nishing Equipment Sales Vo.,

assignee should hay@ helen disigiibeii and simiri {,ofriorritz'im Uf inl-iis 0f assiffnments in thin` iiiii-Q: and that he i with This C0 'rei-tion therein that the snniii maj,`

conform to the record of the vas@ in the yPatent` Oiie.

Signed and sealed this 20th diijir of Api-i1, A. '1). 1926.

M J. MOORE,

Certiricate of Correction.

It is hereby certified that thv` zaesi'lm-v in Letters Patmit Nn. 1,576,725, gruncd March 16, 1926, upon the application of Hvrhext iV. Day, of Noli-Astona Massachusetts, for an improvement in Apparat-us for Applying Coating," was erroneously desciibed and specified Painting & Finishing Equipment Sales C0., a Corporation of Massc-husetts, whereas said assignee should have bevil described and speci fied as Spray Pain/ting and [finishing Equipment Sales ("o., n. (,m'pomtimi of Massachusetts, as shown by the records of assivnmeiits in this oice; and that the said Lette-rs Patent should be read with this co rection there-in that the sume may conform to the record oi the case in the Patent Office.

Signed and sealed this 20th day of April, A. D. i926.

[SEAL] M. J. MOORE,

Arti/ng Commissioner of Patents. 

